.header {
    position: fixed;
    top: 0;
    margin: 0 auto;
    width: 100%;
    height: 58px;
}
 .header .nav{
    width: 90%;
    height: 58px;
}
.header .nav .logo {
    width: 137px;
    height: 43px;
    margin: 10px 5px;
    background-size: auto 38px;
}
.header .nav ul li a{
    line-height: 58px;
}
.section{
    width: 100%;
}
/* 第一块 */
.section .content1{
    padding-top: 100px;
    height: auto;
    width: 100%;
    background-size: cover;
}
.section .content1 .content1_1{
    width: 90%;
    height: 400px;
    padding: 0;
    margin: 0 auto;
}
.section .content1 .content1_1 ul li{
    width: 33.333%;
    /* margin-left: 10%; */

}
.section .content1 .content1_1 ul li img{
    width: 100%;
}
.section .content1 .content1_1 .arrows{
    width: 90%;
    margin-top: 10%;
    margin-left: 5%;
}
/* 第二块 */
.section .content2{
    width: 100%;
    height: 900px;
}
.section .content2 .cnt2{
    width: 90%;
    height: auto;
}
.section .content2 .cnt2 .content2_2 ul li{
    width: 40%;
}
/* 第三块 */
.section .content3{
    width: 100%;
    height: 650px;
}
.section .content3 .cnt3{
    width: 90%;
    height: auto;
}
.section .content3 .cnt3 .content3_2 ul li img{
    width: 100%;
    height: auto;
}
.section .content3 .cnt3 .content3_3{
    margin-top: -50px;
}
/* 第四块 */
.section .content4{
    width: 100%;
    height: 750px;
}
.section .content4 .cnt4{
    width: 90%;
    height: auto;
}
.section .content4 .cnt4 .content4_1 h3{
    font-size: 23px;
}
.content4_2 .content4_left{
    width: 32.5%;
}
.content4_2 .content4_right{
    width: 56%;
}
/* 第五块 */
.section .content5{
    width: 100%;
    height: 300px;
    background-size: cover;
}
.section .content5 .cnt5{
    width: 90%;
}
.section .content5 .cnt5 .content5_2 div{
    font-size: 18px;
}
.section .content5 .cnt5 .content5_2 p{
    width: 330px;
    font-size: 18px;
}
.section .content5 .cnt5 .content5_3 .content5_one{
    margin-left: 40%;
}
.footer{
    width: 100%;
    height: 100px;
}
